PPT vs PPTX vs PDF: Differences and When to Use Each

These three formats serve different purposes. Knowing when to use each one saves you time and avoids compatibility problems.

PPT (PowerPoint 97-2003)

The original PowerPoint format. Uses binary encoding. Files are larger than PPTX. Still supported by modern PowerPoint but no longer the default. You might encounter .ppt files from older archives or legacy systems. Most modern tools recommend converting to PPTX.

PPTX (PowerPoint Open XML)

The current standard since Office 2007. Uses XML inside a ZIP container. Smaller file sizes. Better compatibility with non-Microsoft software like Google Slides and LibreOffice. Supports modern features like 3D objects and SVG images. This is the format you should use for editing.

PDF (Portable Document Format)

Best for sharing and viewing. The layout is locked, so it looks identical everywhere. Cannot be easily edited. Does not support animations or transitions. Best choice when you want to share a presentation without letting others modify it.

Quick Comparison

Use PPTX when you are actively editing or collaborating on a presentation. Use PDF when you want to share a final version that nobody should change. Use PPT only if the recipient specifically requires the older format.

Converting Between Formats

SaveSlide offers tools for working with these formats. The PDF to PPTX converter creates image-based PowerPoint slides from PDF pages. The SlideShare Downloader exports public presentations as PDF.